Apparatus

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sensors Mode-S transponder

15203B

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73787 · AIRBUS A-330-300

Hex
15203B
Octal
05220073
Decimal
1,384,507
Country
RU
Tail
RA-73787
Type
A333
No current signal · last broadcast 11h ago
Flights observed
77
Distinct callsigns
20
Country
RU
Last broadcast
11h ago

Last known position

Most recent position reported by Mode-S 15203B.

Country allocation

The ICAO 24-bit address 15203B falls within the block assigned to Russia (RU) by ICAO Annex 10, Volume III. Every aircraft registered in Russia receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 20 distinct

Callsign Airline Flights Last seen
AFL733 Aeroflot Russian Airlines 9 2026-05-26
AFL629 Aeroflot Russian Airlines 7 2026-05-28
AFL734 Aeroflot Russian Airlines 6 2026-05-27
AFL735 Aeroflot Russian Airlines 5 2026-05-27
AFL628 Aeroflot Russian Airlines 5 2026-05-27
AFL620 Aeroflot Russian Airlines 5 2026-05-02
AFL621 Aeroflot Russian Airlines 4 2026-05-03
AFL861 Aeroflot Russian Airlines 3 2026-04-14
AFL831 Aeroflot Russian Airlines 3 2026-05-23
AFL651 Aeroflot Russian Airlines 3 2026-05-22
AFL627 Aeroflot Russian Airlines 3 2026-05-04
AFL863 Aeroflot Russian Airlines 2 2026-04-13
AFL855 Aeroflot Russian Airlines 2 2026-05-16
AFL654 Aeroflot Russian Airlines 2 2026-05-21
AFL650 Aeroflot Russian Airlines 2 2026-05-24
AFL007 - 2 2026-05-29
AFL837 Aeroflot Russian Airlines 1 2026-05-08
AFL830 Aeroflot Russian Airlines 1 2026-05-22
AFL653 Aeroflot Russian Airlines 1 2026-05-10
AFL652 Aeroflot Russian Airlines 1 2026-05-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 AFL292 SVO → SGN May 29, 16:20 UTCMay 30, 06:15 UTC13h 55m
2026-05-29 AFL007 LED → LED May 29, 07:10 UTCMay 29, 08:10 UTC1h 0m
2026-05-28 AFL629 HKT → LED May 28, 16:50 UTCMay 28, 17:00 UTC10m
2026-05-27 AFL629 HKT → LED May 27, 23:35 UTCMay 28, 11:10 UTC11h 35m
2026-05-27 AFL628 LED → HKT May 27, 18:20 UTCMay 27, 18:35 UTC15m
2026-05-27 AFL735 SSH → LED May 27, 15:30 UTCMay 27, 15:40 UTC10m
2026-05-27 AFL735 SSH → LED May 27, 09:55 UTCMay 27, 11:10 UTC1h 15m
2026-05-27 AFL734 LED → SSH May 27, 05:49 UTCMay 27, 07:10 UTC1h 20m
2026-05-26 AFL734 LED → SSH May 26, 11:24 UTCMay 27, 07:10 UTC19h 45m
2026-05-26 AFL733 HRG → LED May 26, 09:29 UTCMay 27, 07:10 UTC21h 40m
2026-05-26 AFL733 HRG → LED May 26, 05:20 UTCMay 26, 12:30 UTC7h 10m
2026-05-25 AFL026 SVO → SVO May 25, 17:05 UTCMay 25, 18:10 UTC1h 5m
2026-05-24 AFL1725 KHV → SVO May 24, 12:10 UTCMay 25, 04:35 UTC16h 25m
2026-05-24 AFL650 OVB → BKK May 24, 03:10 UTCMay 24, 09:50 UTC6h 40m
2026-05-23 AFL831 CXR → OVB May 23, 22:45 UTCMay 23, 23:20 UTC35m
2026-05-22 AFL830 OVB → CXR May 22, 13:55 UTCMay 22, 14:20 UTC25m
2026-05-22 AFL651 BKK → OVB May 22, 04:05 UTCMay 22, 10:45 UTC6h 40m
2026-05-21 AFL654 KHV → BKK May 21, 08:55 UTCMay 22, 00:25 UTC15h 30m
2026-05-20 AFL650 OVB → BKK May 20, 23:50 UTCMay 21, 06:35 UTC6h 45m
2026-05-20 AFL831 CXR → OVB May 20, 06:40 UTCMay 20, 19:55 UTC13h 15m
2026-05-19 AFL831 CXR → OVB May 19, 23:50 UTCMay 20, 19:55 UTC20h 6m
2026-05-19 AFL651 BKK → OVB May 19, 05:25 UTCMay 20, 00:05 UTC18h 40m
2026-05-18 AFL651 BKK → OVB May 18, 23:50 UTCMay 19, 05:55 UTC6h 5m
2026-05-18 AFL654 KHV → BKK May 18, 17:00 UTCMay 18, 21:35 UTC4h 34m
2026-05-18 AFL1724 SVO → KHV May 18, 03:55 UTCMay 18, 04:20 UTC25m
2026-05-17 AFL1411 SVX → SVO May 17, 08:20 UTCMay 17, 08:35 UTC15m
2026-05-16 AFL855 SYX → SVX May 16, 11:31 UTCMay 17, 00:55 UTC13h 24m
2026-05-16 AFL855 SYX → SVX May 16, 05:10 UTCMay 17, 00:55 UTC19h 45m
2026-05-15 AFL007 SVO → SVO May 15, 08:00 UTCMay 15, 08:05 UTC5m
2026-05-13 AFL628 LED → HKT May 13, 23:55 UTCMay 14, 11:05 UTC11h 10m
2026-05-13 AFL628 LED → HKT May 13, 12:50 UTCMay 14, 11:05 UTC22h 15m
2026-05-13 AFL735 SSH → LED May 13, 10:50 UTCMay 14, 10:45 UTC23h 55m
2026-05-13 AFL735 SSH → LED May 13, 09:55 UTCMay 14, 08:45 UTC22h 50m
2026-05-12 AFL733 HRG → LED May 12, 12:50 UTCMay 13, 07:20 UTC18h 30m
2026-05-12 AFL733 HRG → LED May 12, 10:50 UTCMay 13, 07:20 UTC20h 30m
2026-05-12 AFL733 HRG → LED May 12, 05:10 UTCMay 12, 14:15 UTC9h 5m
2026-05-10 AFL653 BKK → SVX May 10, 06:15 UTCMay 10, 18:55 UTC12h 40m
2026-05-09 AFL652 SVX → BKK May 9, 19:25 UTCMay 10, 01:14 UTC5h 50m
2026-05-08 AFL837 SVO → LED May 8, 18:40 UTCMay 9, 10:15 UTC15h 35m
2026-05-06 AFL293 SGN → SVO May 6, 21:10 UTCMay 7, 13:45 UTC16h 35m
2026-05-05 AFL629 HKT → LED May 5, 00:25 UTCMay 5, 16:50 UTC16h 25m
2026-05-04 AFL629 HKT → LED May 4, 17:40 UTCMay 5, 16:45 UTC23h 6m
2026-05-04 AFL629 HKT → LED May 4, 12:50 UTCMay 5, 11:40 UTC22h 51m
2026-05-04 AFL627 HKT → SVX May 4, 11:35 UTCMay 5, 10:45 UTC23h 11m
2026-05-04 AFL627 HKT → SVX May 4, 04:50 UTCMay 5, 02:40 UTC21h 51m
2026-05-04 AFL627 HKT → SVX May 4, 03:00 UTCMay 5, 02:40 UTC23h 41m
2026-05-03 AFL628 LED → HKT May 3, 21:10 UTCMay 3, 21:29 UTC20m
2026-05-03 AFL621 BKK → LED May 3, 08:20 UTCMay 3, 12:30 UTC4h 10m
2026-05-02 AFL620 LED → BKK May 2, 10:50 UTCMay 3, 05:35 UTC18h 44m
2026-05-02 AFL620 LED → BKK May 2, 10:20 UTCMay 3, 05:35 UTC19h 14m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the RA-73787 page for operator, model, and routing details .

Mode-S 15203B frequently asked

What is Mode-S code 15203B?
15203B is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73787.
Where is Mode-S 15203B registered?
Mode-S code 15203B is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 15203B broadcasting right now?
No active broadcast right now. Last signal was 11h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 15203B, octal 05220073, decimal 1,384,507.
What flights does 15203B operate?
Mode-S 15203B has broadcast 20 distinct callsigns, including AFL733, AFL629, AFL734, AFL735, AFL628.